Jeez Simon, you've been busy 😳! Hope all goes well with the new babby. On the mothballing of the 28,have you considered removing the motor, and dismantling it,and store the components properly? The cycle parts should be relatively easy to protect, but the crankshaft seals may not survive a long term like you propose. I have messaged someone, fairly local to you who may be willing to rebuild your damper, I'll let you know Best of luck. Owen.